Names for Senia's possible sister.

Hi! I have one daughter who has just turned 2 and now me and my husband are expecting our second child together. My EDD is the 3rd September and I'm currently 27 weeks along. My daughter was born early (35 weeks) and we hadn't chosen the name so we want to make sure we have at least a few names ready incase this one is born early.

Our daughters name is Senia Hero and she gets nicknames Nia sometimes but her main nickname is Lamb. I'm not sure where it came from though! People always say it's a cute pet name, haha!